sting-stored functions... plz help!

[jsnovice]

this is my first post! yay...
I am sorry if i'm very... ... ambiguous...
i have a problem that i can't seem find the direct solution to on the web, so i'm asking it here. can someone please help me with this problem? ::

i can't seem to figure a way to use a string-stored function ...as a function...
i'm making a console 'program' out of javascript
i want a feature that allows the user to type out ANY javascript function and input it into the console so that it can run it

for example...
when i input the string "window.refresh()" or "window.close()" and store it into a variable like "cmdinput", i need a code that can read "cmdinput" and execute the string representing the function.

>my question is this: What do i do to get "cmdinput" into a string that can be executed? /or/ How do i get the browser to execute the function that is stored in a string?
i tried stuff like "javasript:cmdinput()" but i can't seem to get the string into something the browser can recognize as a command of a script...i don't know my string manipulations enough!

all replies appreciated! Thanks~

[monamac]

i believe it is:

eval(string);

hope this helps.

[monamac]

soo....

var codeToEvaluate = "cmdinput();";
eval(codeToEvaluate);

should execute the function.... i believe ;)